Tetradic

tet·rad  (ttrd)

n.

1. A group or set of four.

2. A tetravalent atom, radical, or element.

3. Biology

a. A four-part structure that forms during the prophase of meiosis and consists of two homologous chromosomes, each composed of two sister chromatids.

b. Botany A group of four cells, as of spores or pollen grains, formed by division of one mother cell.

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[Greek tetras, tetrad-; see k^wetwer- in Indo-European roots.]

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te·tradic adj.